<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
</head>
<body>
    <h1>axios请求拦截器</h1>
  <button id="btn">发送请求</button>
  <script>
    // 创建一个axios实例 并配置这个实例
    const myAxios =axios.create({
        baseURL:'/',
        timeout:10000,
        haeders:{}
    })
    // use方法接受两个回调函数,正常都会进入到第一个回调函数中
    myAxios.interceptors.request.use((config) => {
      console.log(config)

     console.log('123');

      //最后一定要把config再返回出去(放行)
      return config;
    }, (err) => {
      return Promise.reject(err.message)
    });
    // 获取元素
    const oBtn = document.getElementById("btn")
    // 绑定点击事件
    oBtn.onclick= async function(){
        const re = await myAxios.get('/user',{
            params:{

            }
        })
        console.log(re,'re');
    }
  </script>
</body>
</html>